#include<iostream>
#include<fstream>
using namespace std;

void hexOutput(char s) {
	int num;
	char tmpchar;
	num = s & 0b11110000;
	num >>= 4;
	if(num < 10) 
		cout << num;
	else {
		tmpchar = 'a' + (num-10);
		cout << tmpchar;
	}
	num = s & 0b00001111;
	if(num < 10) 
		cout << num;
	else {
		tmpchar = 'a' + (num-10);
		cout << tmpchar;
	}
	cout << " ";
}

int main() {
	ifstream fin("HelloWorld.class");
	char s;
	while(fin >> s) {
		hexOutput(s);
	}
	return 0;
}
